Helfert, Erich A., author
McGraw-Hill/Irwin, 2003
Buku Teks
Venanzi, Daniela, author
[Springer, ], 2012
eBooks
Helfert, Erich A., author
Richard D. Irwin, 1967
Buku Teks
Helfert, Erich A., author
Richard D. Irwin, 1982
Buku Teks
Helfert, Erich A., author
Richard D. Irwin, 1977
Buku Teks